Saturation vapor pressure data table at various key temperature points below 300°C

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Table of saturated vapor pressure values at various key temperature points below 300°C. I. Explanation of important concepts: 1. Saturated vapor pressure: The pressure exerted by vapor when a liquid and its vapor are in equilibrium at a certain temperature (that is, when the rates of evaporation and condensation are equal). 2. Unit explanation: kPa: kilopascal, the international standard unit of pressure. MPa: Megapascals, 1 MPa = 1000 kPa. °C: Degrees Celsius. II. Saturation Vapor Pressure Table for Water Temperature (0°C to 300°C)
Temperature (°C) | Saturation Vapor Pressure (kPa) | Saturation Vapor Pressure (MPa) | Remarks
0 | 0.6113 | 0.000611 | Triple point of water
20 | 2.3390 | 0.002339 | Near room temperature
40 | 7.3840 | 0.007384 |
60 | 19.9400 | 0.01994 |
80 | 47.3900 | 0.04739 |
100 | 101.3300 | 0.10133 | Boiling point of water at 1 standard atmosphere
120 | 198.6700 | 0.19867 |
140 | 361.4700 | 0.36147 |
160 | 618.2800 | 0.61828 |
180 | 1002.80 | 0.10028 | Pressure exceeds 1 MPa
200 | 1554.90 | 1.5549 |
220 | 2320.10 | 2.3201 |
240 | 3347.00 | 3.3470 |
260 | 4692.00 | 4.6920 |
280 | 6412.00 | 6.4120 |
300 | 8588.00 | 8.5880 | Near critical temperature (critical point: 374.14°C, 22.064 MPa)

III. Explanation of Data Trends and Key Points:
1. Non-linear growth: The saturation vapor pressure of water increases exponentially as temperature rises, rather than linearly. For example, from 0°C to 100°C, as the temperature increases by 100 degrees, the pressure rises from 0.6 kPa to 101 kPa ； And from 200°C to 300°C, an increase of another 100 degrees sees the pressure surge from 1.55 MPa to 8.59 MPa. 2. Relationship between boiling point and pressure: This table clearly shows why pressure cookers can raise the boiling point of water. At 180°C, a pressure of over 1 MPa is required to keep water in a liquid state, which is much higher than the atmospheric pressure at 100°C. 3. Critical point: The critical temperature of water is 374.14°C, and the critical pressure is 22.064 MPa. Above the critical point, the physical differences between liquid water and water vapor disappear, resulting in a state known as a \"supercritical fluid\". 300°C is already very close to this critical point.